my iphone13 camera quality is bad

I bought my iPhone 13 in jan6 2022

I noticed the quality isn’t good enough which is supposed to be in iPhone 13 .As I was a new user I didn’t realise earlier , yesterday I compared my friends iPhone 13 with mine , there was huge difference. Mine was blurry , faded, I contacted Apple team as well as service centre, they are like u need to submit your phone we ll open it and check it , I want a complete replacement as it’s a manufacturing defect in mu iPhone 13 , it’s a brand new phone with 100% battery life no scratches , in mint condition, y should I left them open my phoen, they aren’t agreeing for completel replacement. What can I do now ?